Clef

io.github.MelMayssonOwenv1.0.0Updated Oct 3, 2026

Read-only music guides, chord transposition, piano chord spelling and guitar-tab pitch mapping.

VerifiedStreamable HTTPWeb executableMedia & Design

Overview

AI-generated overview

A read-only music reference server that transposes chords, spells piano chords, and maps guitar-tab pitches for an assistant.

What it does
Clef exposes read-only music guides and theory helpers. According to its description, it can transpose chord progressions, spell out piano chords, and map guitar-tab pitches. It is a remote endpoint, so the assistant connects to it rather than running anything locally.
When to use it
Worth adding when an assistant is expected to answer music theory questions, rewrite songs in a different key, or interpret guitar tablature. It is not aimed at audio playback, recording, or editing music files.
Requirements
A remote MCP endpoint at clefdrills.com reached over streamable HTTP. No packages, environment variables, headers, or authentication are declared, so only network access to that endpoint is needed.
Before you install
The server is described as read-only, so it should not modify data. Because it is a remote endpoint with no declared authentication, requests and any content sent to it leave the user's machine; avoid sending private or sensitive material.

Installation

In SourceWeft

  1. Open Clef in the dashboard and add it to a workspace.
  2. Enable the server for the chats that should use its tools.

Web executable via Streamable HTTP. Remote servers run from the web runtime once configured in a workspace.

Other MCP clients

Add this to your client's mcpServers config.

{
  "mcpServers": {
    "clef": {
      "type": "http",
      "url": "https://clefdrills.com/mcp"
    }
  }
}

Tools

0
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Version history

1
  1. v1.0.0LatestOct 3, 2026